Formation of varistor layer at the surface of SrTiO3-based ceramics by KrF excimer laser irradiation

被引：0
|
作者：
Yoon, Jong-Won [1 ]
Higaki, Katsuki [2 ]
Miyayama, Masaru [3 ]
Kudo, Tetsuichi [1 ]
机构：
[1] Department of Applied Chemistry, Graduate School of Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
[2] Research and Development Department, Osaka Gas Co., Ltd., 6-19-9, Torishima, Konohana-ku, Osaka-ski 554-0051, Japan
[3] Institute of Industrial Science, University of Tokyo, 7-22-1, Roppongi, Minato-ku, Tokyo 106-8558, Japan
来源：
Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan | 1999年 / 107卷 / 1252期
关键词：
Current voltage characteristics - Excimer lasers - Grain boundaries - Polycrystals - Strontium compounds - Varistors;
D O I：
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中图分类号：
学科分类号：
摘要：
KrF excimer laser was irradiated on insulating SrTiO3 polycrystals sintered in air and diffused with metal oxides through grain boundary. Surface varistor layer with nonlinear coefficient of 2.8-5.2 was formed by the laser irradiation. The exhibition of nonlinear I-V characteristics is attributed to surface grains made semiconductive by laser irradiation and the potential barrier at grain boundaries preserved after laser irradiation. The varistor layer was found to be formed by excimer laser irradiation on SrTiO3-based ceramics without the heat treatment in reducing atmosphere.
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页码：1229 / 1231
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